CN1702799A - Overcurrent release device for circuit breaker - Google Patents
Overcurrent release device for circuit breaker Download PDFInfo
- Publication number
- CN1702799A CN1702799A CN 200410100770 CN200410100770A CN1702799A CN 1702799 A CN1702799 A CN 1702799A CN 200410100770 CN200410100770 CN 200410100770 CN 200410100770 A CN200410100770 A CN 200410100770A CN 1702799 A CN1702799 A CN 1702799A
- Authority
- CN
- China
- Prior art keywords
- circuit
- release device
- breaker
- overcurrent
- solenoid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Breakers (AREA)
Abstract
This overcurrent tripping device 40 of a circuit breaker 100 is equipped with: a thermal tripping means operated when a bimetallic strip 45 is deformed by a predetermined amount by a heat value based on a carried current flowing through a circuit and formed so as to actuate a switching mechanism 3; and an electromagnetic tripping means 42 having an electromagnetic coil 42a generating electromagnetic force based on a carried current, and formed so as to be operated when the electromagnetic force exceeds a predetermined value to actuate the switching mechanism 3. In the device, by forming the electromagnetic coil 42a with a low-resistance member for generating a predetermined heat value when the carried current flows therethrough, a heater for heating the bimetallic strip 45 is omitted.
Description
Technical field
The present invention relates in the circuit to flow when overcurrent is arranged the circuit-breaker of current interruption, particularly relate to by detecting overcurrent and make switching mechanism produce the overcurrent release device of the circuit-breaker of release movement.
Background technology
The overcurrent release device of traditional circuit-breaker is to be made of bimetallic and electromagnet, the end of reeling on bimetallic is connected with fixed contact and heater that the other end is connected with bimetallic upper end, bimetallic bottom is supported on the bi-metal stent, and is connected with the electric property of bi-metal stent.
Electromagnet has movable core in the inboard of solenoid, and an end of solenoid is connected with bi-metal stent, and the other end is connected with load side terminal.
The overcurrent release device of the circuit-breaker of said structure, in case the electric current that flows in the circuit forms the overload state, the occasion of then crooked or the big electric current that short circuit current and so on is arranged of in circuit, flowing because of bimetallic, the movable core moment ground of electromagnet is attracted, overcurrent release device is thrown off the locking of switching mechanism, utilize the power of holding that opens and closes spring that opening is rotated, movable contact is opened from (for example, with reference to patent documentation 1, Fig. 7, Fig. 8).
[patent documentation 1] Japan Patent spy opens the 2000-340093 communique
The overcurrent release device of traditional circuit-breaker is wound on structure on the bimetallic because of having adopted with heater, so the problem that operation is poor, cost is high when existing assembling.
Summary of the invention
The present invention makes in order to solve above-mentioned problem, and its purpose is, is provided at the heater that do not need on the bimetallic to reel, assembling operation is good and the overcurrent release device of circuit-breaker cheaply.
The overcurrent release device of circuit-breaker of the present invention comprises: thus the caloric value that electrical current produced that flows in utilizing by circuit is moved the moving releasing device of heat that makes the open-close mechanism section start when making the distortion of bimetallic generation ormal weight; Thereby and have according to electrical current and the solenoid of electromagnetic force take place, when surpassing setting, move the electromagnetic release device that makes the open-close mechanism section start by electromagnetic force that this solenoid took place, the resistance material that the caloric value of regulation takes place when being flowed by electrical current described solenoid constitutes.
Again, the resistance material as constituting solenoid can use copper nickel or nickel chromium triangle copper.
Adopt the present invention, even move releasing device, be not to be wound with the such heater of conventional apparatus on the bimetallic in heat, also can make the moving releasing device of heat that overcurrent is made action reliably, can obtain the good and overcurrent release device of circuit-breaker cheaply of assembling operation.
Description of drawings
Fig. 1 is the cutaway view of the closed circuit state of the circuit-breaker of expression embodiments of the invention 1.
Fig. 2 is the cutaway view of the open-circuit condition of the circuit-breaker of expression embodiments of the invention 1.
Fig. 3 is the stereoscopic figure of the overcurrent release device of the circuit-breaker of expression embodiments of the invention 1.
Fig. 4 is the sectional view of the overcurrent release device of the circuit-breaker of expression embodiments of the invention 1.
Embodiment
[embodiment 1]
The overcurrent release device of the circuit-breaker of embodiments of the invention 1 is described below with reference to Fig. 1～Fig. 4.
Fig. 1 is the cutaway view of the closed circuit state of the circuit-breaker of expression embodiments of the invention 1, Fig. 2 is the cutaway view of the open-circuit condition of the same circuit-breaker of expression, Fig. 3 is the stereoscopic figure of the overcurrent release device of the same circuit-breaker of expression, and Fig. 4 is the sectional view of the overcurrent release device of the same circuit-breaker of expression.In addition, among each figure, prosign is represented with a part.
The overall structure of the circuit-breaker 100 of embodiments of the invention 1 at first is described.
Among Fig. 1, Fig. 2,5 and 6 is a pair of fixed contacts, and these fixed contact 5,6 relative shapes set, and, a square end separately affixed fixed contact 5a, 6a.
The 7th, with the movable contact 7 of described fixed contact 5,6 bridge joints, affixed travelling contact 7a on the position relative with fixed contact 5a, 6a.The 8th, push rod, movable contact 7 from fixed contact 5,6 open from the side in the opposite direction, engage with the substantial middle portion of this movable contact 7, be used to make movable contact 7 from fixed contact 5,6 open from member.The 9th, for the movable contact 7 that makes another not shown utmost point and fixed contact 5,6 open from and be across the crossbar that sets between another utmost point.
The 40th, overcurrent release device, this overcurrent release device 40 links with described push rod 8 and crossbar 9, the electric current that flows to fixed contact 5,6 is detected the detailed content aftermentioned.
The 3rd, the open-close mechanism section that moves according to the testing result of overcurrent release device 40.The 12nd, connect pressing spring, a square end engages with the substantial middle portion of movable contact 7, and another square end docks with the bottom of housing 1, and movable contact 7 is urged to fixed contact 5,6.The 14th, closely meet the explosion chamber that shape sets with the two end portions of movable contact 7, form by a plurality of flat screen 14a, respectively to movable contact 7 from fixed contact 5,6 open from the time electric arc that takes place carry out extinguishing arc.The 15th, make the turn of tidal stream electrode that turn of tidal stream takes place, be incorporated in the lower face of the housing 1 of circuit-breaker 100, be used for to movable contact 7 from fixed contact 5,6 open from the time electric arc that takes place carry out turn of tidal stream.
In above-mentioned open-close mechanism section 3, be equipped with: with manually can make movable contact 7 from fixed contact 5,6 open from handle 2, the action of this handle 2 is passed to the not shown linkage of crossbar 9 and magnetic bar 3a, interlock plate 3b, the trip(ping) bar 3c that the action of overcurrent release device 40 described later is passed to open-close mechanism section 3.
The structure of above-mentioned overcurrent release device 40 is described below with reference to Fig. 3, Fig. 4.
The resistance material regulation caloric value, that form such as, copper nickel or nickel chromium triangle copper in said structure, as solenoid 42a, takes place and constitutes in the overcurrent release device of the circuit-breaker of embodiments of the invention 1 when being flowed by electrical current.
In general, the specific insulation of resistance material, with respect to 1.71 μ Ω cm as the employed tough pitch copper of material of solenoid, copper nickel is 4 μ Ω cm, nickel chromium triangle copper is 142 μ Ω cm, copper nickel is such as the circuit-breaker that is used in 1.5～10A rated value, and nickel chromium triangle copper is such as the circuit-breaker that is used in 0.5～1.5A rated value.
Bimetallic 45 is adapted to its plane and the opposed form of solenoid 42a, with the caloric value that is convenient to accept take place by solenoid 42a, and, to be heated and to make bimetallic 45 crooked easily in order to utilize, the coiling portion of solenoid 42a is offset to the position approaching with the fixation side of bimetallic 45.
In the foregoing description 1, solenoid 42a is formed by circular wire rod, but if formed by square wire rod, forms the plane by the radiating surface that makes solenoid 42a, then can expeditiously heat directly be transmitted to bimetallic 45.
The overcurrent action of circuit-breaker 100 of the embodiments of the invention 1 of above structure is described below with reference to Fig. 1, Fig. 2 and Fig. 4.
(1) under closed circuit state (Fig. 1), the travelling contact 7a of movable contact 7 docks with fixed contact 5a, the 6a of fixed contact 5,6, and utilization simultaneously connects pressing spring 12 movable contact 7 is urged to fixed contact 5,6.
(2) in case overcurrent from power supply side terminal 41 via solenoid 42a, fixed contact 6, movable contact 7, fixed contact 5 flows, then the solenoid 42a as resistance material generates heat, bimetallic 45 is accepted this heat and towards the bending of arrow A direction, interlock plate 3b acts on trip(ping) bar 3c, makes open-close mechanism section 3 actions.
(3) in case open-close mechanism section 3 moves, and then crossbar 9 pushes movable contacts 7, movable contact 7 overcomes the application of force that connects pressing spring 12 and opens from (Fig. 2) from fixed contact 5,6.
(4) between fixed contact 5a, 6a and travelling contact 7a electric arc takes place, this electric arc is when explosion chamber 14 moves, and turn of tidal stream is to turn of tidal stream electrode 15, and electric arc is opened circuit the overcurrent that flows to fixed contact 5,6 by current limliting.
Below with reference to Fig. 1, Fig. 2 and Fig. 4 the mobile action that the big current applications of short circuit current and so on is arranged in the circuit-breaker 100 is described.
(1) from power supply side terminal 41 via solenoid 42a, fixed contact 6, movable contact 7, fixed contact 5 flows short circuit current is arranged, the electromagnetic force of then utilizing solenoid 42a to be taken place, the application of force that plunger 42c overcomes helical spring 42b moves towards the arrow B direction, one square end integraty of the armature 43 that engages with hook 42c1 moves, and another square end is that fulcrum rotates (Fig. 4) towards the arrow C direction with axle 44.
(2) in case armature 43 rotates, and then push rod 8 is urged, movable contact 7 overcomes the application of force that connects pressing spring 12 and opens from (Fig. 2) from fixed contact 5,6.
Simultaneously, armature 43 makes magnetic bar 3a rotate towards arrow D direction, makes open-close mechanism section 3 actions.
(3) in case open-close mechanism section 3 moves, and then crossbar 9 pushes movable contacts 7, movable contact 7 overcomes the application of force that connects pressing spring 12 and opens from (Fig. 2) from fixed contact 5,6.
(4) between fixed contact 5a, 6a and travelling contact 7a electric arc takes place, this electric arc is when explosion chamber 14 moves, and turn of tidal stream is to turn of tidal stream electrode 15, and electric arc is opened circuit the short circuit current that flows to fixed contact 5,6 by current limliting.
As mentioned above, adopt the overcurrent release device of the circuit-breaker of embodiments of the invention 1, because resistance material (copper nickel, the nickel chromium triangle copper etc.) formation of the caloric value of being stipulated when constituting the solenoid of electromagnetic release device and be by overcurrent flows, therefore, even move releasing device, be not to be wound with the such heater of conventional apparatus on the bimetallic in heat, also can make the moving releasing device of heat that overcurrent is made action reliably, can obtain the good and overcurrent release device of circuit-breaker cheaply of assembling operation.
Again, by forming solenoid by square wire rod, can be expeditiously with heat transferred bimetallic 45 that solenoid took place.
Again, bimetallic plane is adapted to and the opposed form of solenoid, and/or the coiling portion of solenoid is biased in the position of approaching the bimetallic fixation side, make bimetallic crooked easily, can make the action of the moving releasing device of the caused heat of bimetallic more reliable.
Utilizability on the industry
The present invention is applicable to have and uses the moving releasing device of bimetallic heat and use the electromagnetism of solenoid to release Put the circuit-breaker of device.
Claims (6)
1. circuit-breaker overcurrent release device comprises:
Thereby when making the distortion of bimetallic generation ormal weight, the caloric value that electrical current produced that flows moves the moving releasing device of heat that makes the open-close mechanism section start in utilizing by circuit;
Thereby and have according to electrical current and the solenoid of electromagnetic force take place, when surpassing setting, move the electromagnetic release device that makes the open-close mechanism section start by electromagnetic force that this solenoid took place, it is characterized in that,
Described solenoid is made of the resistance material that the caloric value of regulation takes place when electrical current flows.
2. the overcurrent release device of circuit-breaker as claimed in claim 1 is characterized in that, described resistance material is copper nickel or nickel chromium triangle copper.
3. the overcurrent release device of circuit-breaker as claimed in claim 1 or 2 is characterized in that, solenoid is formed by square wire rod.
4. the overcurrent release device of circuit-breaker as claimed in claim 1 or 2 is characterized in that, bimetallic plane is adapted to and the opposed form of solenoid.
5. the overcurrent release device of circuit-breaker as claimed in claim 1 or 2 is characterized in that, the coiling portion of solenoid is offset to bimetallic fixation side.
6. the overcurrent release device of circuit-breaker as claimed in claim 1 or 2, it is characterized in that, when described electrical current is the 1st overcurrent, only make the moving releasing device action of described heat, when electrical current during than big the 2nd overcurrent of described the 1st overcurrent, make described electromagnetic release device action, and electrical current is opened circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004157458 | 2004-05-27 | ||
| JP2004157458A JP2005339997A (en) | 2004-05-27 | 2004-05-27 | Overcurrent tripping device of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1702799A true CN1702799A (en) | 2005-11-30 |
| CN100361257C CN100361257C (en) | 2008-01-09 |
Family
ID=35493318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410100770XA Expired - Fee Related CN100361257C (en) | 2004-05-27 | 2004-11-30 | Overcurrent release device for circuit breaker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005339997A (en) |
| CN (1) | CN100361257C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667994A (en) * | 2009-12-02 | 2012-09-12 | 东京毅力科创株式会社 | Branch wire system |
| CN106783434A (en) * | 2017-02-14 | 2017-05-31 | 张文红 | A kind of heavy current breaker and its tripping mechanism with oil damping hydraulic-electromagnetic tripping mechanism |
| CN107478889A (en) * | 2016-11-01 | 2017-12-15 | 西安交通大学 | A kind of quick identification device of electromagnetic type short circuit current and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2673487B1 (en) * | 1991-02-28 | 1993-10-29 | Telemecanique | PROTECTION SWITCH INCORPORATING A TRIGGERING MAGNETOTHERMAL SUB-ASSEMBLY. |
| JPH0594757A (en) * | 1991-03-20 | 1993-04-16 | Matsushita Electric Works Ltd | Electromagnet device for remote control type circuit breaker |
| JPH10255607A (en) * | 1997-03-07 | 1998-09-25 | Toshiba Corp | High-speed switch device |
-
2004
- 2004-05-27 JP JP2004157458A patent/JP2005339997A/en active Pending
- 2004-11-30 CN CNB200410100770XA patent/CN100361257C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667994A (en) * | 2009-12-02 | 2012-09-12 | 东京毅力科创株式会社 | Branch wire system |
| CN107478889A (en) * | 2016-11-01 | 2017-12-15 | 西安交通大学 | A kind of quick identification device of electromagnetic type short circuit current and method |
| CN106783434A (en) * | 2017-02-14 | 2017-05-31 | 张文红 | A kind of heavy current breaker and its tripping mechanism with oil damping hydraulic-electromagnetic tripping mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100361257C (en) | 2008-01-09 |
| JP2005339997A (en) | 2005-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4278787B2 (en) | Circuit breaker with high dynamic power and breaking capacity | |
| EP2204834B1 (en) | Trip mechanism for circuit breaker | |
| KR920006061B1 (en) | Molded case circuit breaker with single solenoid operator for rectilinear handle movement | |
| EP0827174A1 (en) | Circuit breaker with latch preventing rebound of blow open contact arm | |
| KR940001119B1 (en) | Molded case circuit breaker with an improved contoured cradle | |
| CN1073744C (en) | Circuit breaker | |
| CN1023359C (en) | Circuit breaker with moving magnetic core for low current magnetic trip | |
| RU2485617C2 (en) | Switchgear | |
| US7132912B2 (en) | Moving contact unit for a contact arrangement in a circuit breaker | |
| KR930007121B1 (en) | Circuit breaker | |
| RU2363066C2 (en) | Switch device | |
| CA1104619A (en) | Low profile multi-pole circuit breaker having multiple toggle springs | |
| CA1252137A (en) | Circuit breaker with arm latch for high interrupting capacity | |
| JPH0127250Y2 (en) | ||
| CN1360327A (en) | Circuit breaker with bypass conductor and method for changeover of current in bimetal sheet | |
| KR940001120B1 (en) | Molded case circuit breaker with an improved operating mechanism having a pivot transfer trip-free linkage | |
| CN1702799A (en) | Overcurrent release device for circuit breaker | |
| US4553116A (en) | Molded case circuit breaker with resettable combined undervoltage and manual trip mechanism | |
| CA2717317A1 (en) | A switchgear | |
| US4620171A (en) | Molded case circuit breaker with resettable combined undervoltage and manual trip mechanism | |
| US4255636A (en) | Circuit breaker with current carrying conductor system utilizing eddy current repulsion | |
| US4240053A (en) | Circuit breaker utilizing improved current carrying conductor system | |
| EP3981019B1 (en) | Electrical contact system for a switching device | |
| CN1340838A (en) | Circuit treaker for magnetic induction type automatic trip component with realized spring clip | |
| CN1065070C (en) | Dual action armature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20101130 |